{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:SM53LI6NLT76L3PXJWI3OP7PBK","short_pith_number":"pith:SM53LI6N","canonical_record":{"source":{"id":"2408.04946","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"quant-ph","submitted_at":"2024-08-09T09:01:37Z","cross_cats_sorted":[],"title_canon_sha256":"5162b1dd9775d2416c3d0b7c9bd9c87457dd1a5132d71cc0bde3634050a771d8","abstract_canon_sha256":"231363991e3ebb1caf7c9b154952a17afeb1cd7931de9437c0c63f688ae06974"},"schema_version":"1.0"},"canonical_sha256":"933bb5a3cd5cffe5edf74d91b73fef0a9135fd85eee89bb87c0d623f7f7cf311","source":{"kind":"arxiv","id":"2408.04946","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.04946","created_at":"2026-07-05T12:09:10Z"},{"alias_kind":"arxiv_version","alias_value":"2408.04946v4","created_at":"2026-07-05T12:09:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.04946","created_at":"2026-07-05T12:09:10Z"},{"alias_kind":"pith_short_12","alias_value":"SM53LI6NLT76","created_at":"2026-07-05T12:09:10Z"},{"alias_kind":"pith_short_16","alias_value":"SM53LI6NLT76L3PX","created_at":"2026-07-05T12:09:10Z"},{"alias_kind":"pith_short_8","alias_value":"SM53LI6N","created_at":"2026-07-05T12:09:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:SM53LI6NLT76L3PXJWI3OP7PBK","target":"record","payload":{"canonical_record":{"source":{"id":"2408.04946","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"quant-ph","submitted_at":"2024-08-09T09:01:37Z","cross_cats_sorted":[],"title_canon_sha256":"5162b1dd9775d2416c3d0b7c9bd9c87457dd1a5132d71cc0bde3634050a771d8","abstract_canon_sha256":"231363991e3ebb1caf7c9b154952a17afeb1cd7931de9437c0c63f688ae06974"},"schema_version":"1.0"},"canonical_sha256":"933bb5a3cd5cffe5edf74d91b73fef0a9135fd85eee89bb87c0d623f7f7cf311","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T12:09:10.319244Z","signature_b64":"pWTUGHSll5+pLgQq0l2H6GU9M2sqf1epChDYWrBx3ix0WECGDGxBT/sepKpF1qIsK5EaHonPHGCEGs1RCEF7BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"933bb5a3cd5cffe5edf74d91b73fef0a9135fd85eee89bb87c0d623f7f7cf311","last_reissued_at":"2026-07-05T12:09:10.318747Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T12:09:10.318747Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2408.04946","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T12:09:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A401qw0LzsZV4zvdiRSt6f6RA/S2nNs6q7mYU77fm115pqqqifN3p5vxFAqMyAWoklkj6Si0uqJRDMCjH/dFDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-13T06:22:27.406350Z"},"content_sha256":"dae20a787d0f3d23ad528c0f51f5d7be5213deb8290d3dea0640125ab8d6ef49","schema_version":"1.0","event_id":"sha256:dae20a787d0f3d23ad528c0f51f5d7be5213deb8290d3dea0640125ab8d6ef49"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:SM53LI6NLT76L3PXJWI3OP7PBK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tensor-based quantum phase difference estimation for large-scale demonstration","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Hajime Nakamura, Hiroshi Yamauchi, Kenji Sugisaki, Naoki Yamamoto, Qi Gao, Rei Sakuma, Shu Kanno, Takao Kobayashi","submitted_at":"2024-08-09T09:01:37Z","abstract_excerpt":"We develop an energy calculation algorithm leveraging quantum phase difference estimation (QPDE) scheme and a tensor-network-based unitary compression method in the preparation of superposition states and time-evolution gates. Alongside its efficient implementation, this algorithm reduces depolarization noise affections exponentially. We demonstrated energy gap calculations for one-dimensional Hubbard models on IBM superconducting devices using circuits up to 32-system (plus one-ancilla) qubits, a five-fold increase over previous QPE demonstrations, at the 7242 controlled-Z gate level of stand"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.04946","kind":"arxiv","version":4},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2408.04946/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T12:09:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CGHlDKlMLozSJ3vOZ+uF+8lMGN1nwuhSHXp0spSbhbKr3BYKqxNu6CCJ/nqZ5pmHvtc0zJySSNVH4cMiCSxpDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-13T06:22:27.406727Z"},"content_sha256":"190103abdc4cb49fa6a30157c95066f80ae142b5f7cd76e5c3365b1643d6761a","schema_version":"1.0","event_id":"sha256:190103abdc4cb49fa6a30157c95066f80ae142b5f7cd76e5c3365b1643d6761a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SM53LI6NLT76L3PXJWI3OP7PBK/bundle.json","state_url":"https://pith.science/pith/SM53LI6NLT76L3PXJWI3OP7PBK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SM53LI6NLT76L3PXJWI3OP7PBK/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-13T06:22:27Z","links":{"resolver":"https://pith.science/pith/SM53LI6NLT76L3PXJWI3OP7PBK","bundle":"https://pith.science/pith/SM53LI6NLT76L3PXJWI3OP7PBK/bundle.json","state":"https://pith.science/pith/SM53LI6NLT76L3PXJWI3OP7PBK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SM53LI6NLT76L3PXJWI3OP7PBK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:SM53LI6NLT76L3PXJWI3OP7PBK","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"231363991e3ebb1caf7c9b154952a17afeb1cd7931de9437c0c63f688ae06974","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"quant-ph","submitted_at":"2024-08-09T09:01:37Z","title_canon_sha256":"5162b1dd9775d2416c3d0b7c9bd9c87457dd1a5132d71cc0bde3634050a771d8"},"schema_version":"1.0","source":{"id":"2408.04946","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.04946","created_at":"2026-07-05T12:09:10Z"},{"alias_kind":"arxiv_version","alias_value":"2408.04946v4","created_at":"2026-07-05T12:09:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.04946","created_at":"2026-07-05T12:09:10Z"},{"alias_kind":"pith_short_12","alias_value":"SM53LI6NLT76","created_at":"2026-07-05T12:09:10Z"},{"alias_kind":"pith_short_16","alias_value":"SM53LI6NLT76L3PX","created_at":"2026-07-05T12:09:10Z"},{"alias_kind":"pith_short_8","alias_value":"SM53LI6N","created_at":"2026-07-05T12:09:10Z"}],"graph_snapshots":[{"event_id":"sha256:190103abdc4cb49fa6a30157c95066f80ae142b5f7cd76e5c3365b1643d6761a","target":"graph","created_at":"2026-07-05T12:09:10Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2408.04946/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We develop an energy calculation algorithm leveraging quantum phase difference estimation (QPDE) scheme and a tensor-network-based unitary compression method in the preparation of superposition states and time-evolution gates. Alongside its efficient implementation, this algorithm reduces depolarization noise affections exponentially. We demonstrated energy gap calculations for one-dimensional Hubbard models on IBM superconducting devices using circuits up to 32-system (plus one-ancilla) qubits, a five-fold increase over previous QPE demonstrations, at the 7242 controlled-Z gate level of stand","authors_text":"Hajime Nakamura, Hiroshi Yamauchi, Kenji Sugisaki, Naoki Yamamoto, Qi Gao, Rei Sakuma, Shu Kanno, Takao Kobayashi","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"quant-ph","submitted_at":"2024-08-09T09:01:37Z","title":"Tensor-based quantum phase difference estimation for large-scale demonstration"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.04946","kind":"arxiv","version":4},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:dae20a787d0f3d23ad528c0f51f5d7be5213deb8290d3dea0640125ab8d6ef49","target":"record","created_at":"2026-07-05T12:09:10Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"231363991e3ebb1caf7c9b154952a17afeb1cd7931de9437c0c63f688ae06974","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"quant-ph","submitted_at":"2024-08-09T09:01:37Z","title_canon_sha256":"5162b1dd9775d2416c3d0b7c9bd9c87457dd1a5132d71cc0bde3634050a771d8"},"schema_version":"1.0","source":{"id":"2408.04946","kind":"arxiv","version":4}},"canonical_sha256":"933bb5a3cd5cffe5edf74d91b73fef0a9135fd85eee89bb87c0d623f7f7cf311","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"933bb5a3cd5cffe5edf74d91b73fef0a9135fd85eee89bb87c0d623f7f7cf311","first_computed_at":"2026-07-05T12:09:10.318747Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:09:10.318747Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pWTUGHSll5+pLgQq0l2H6GU9M2sqf1epChDYWrBx3ix0WECGDGxBT/sepKpF1qIsK5EaHonPHGCEGs1RCEF7BQ==","signature_status":"signed_v1","signed_at":"2026-07-05T12:09:10.319244Z","signed_message":"canonical_sha256_bytes"},"source_id":"2408.04946","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dae20a787d0f3d23ad528c0f51f5d7be5213deb8290d3dea0640125ab8d6ef49","sha256:190103abdc4cb49fa6a30157c95066f80ae142b5f7cd76e5c3365b1643d6761a"],"state_sha256":"bbcc317937bbb0d4093ca09312505bba3041dc0df1c60918c381963921bacaa5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HsPxn4efpLCilgBTAiNUumrNYGuUyvP3scIeL+F7Qv+8xCK2djbtN/7TOqk1xyh53XYE0Tzr77bCXupPmXuFAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-13T06:22:27.408739Z","bundle_sha256":"b60be27aa17f1019041df7c0d65f2bdc47cd47567d69953035f643d3a9710687"}}